OpenCores
URL https://opencores.org/ocsvn/test_project/test_project/trunk

Subversion Repositories test_project

[/] [test_project/] [trunk/] [linux_sd_driver/] [fs/] [ext4/] [xattr.h] - Blame information for rev 62

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 62 marcus.erl 
/*
2 
  File: fs/ext4/xattr.h
3 
 
4 
  On-disk format of extended attributes for the ext4 filesystem.
5 
 
6 
  (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
7 
*/
8 
 
9 
#include <linux/xattr.h>
10 
 
11 
/* Magic value in attribute blocks */
12 
#define EXT4_XATTR_MAGIC                0xEA020000
13 
 
14 
/* Maximum number of references to one attribute block */
15 
#define EXT4_XATTR_REFCOUNT_MAX         1024
16 
 
17 
/* Name indexes */
18 
#define EXT4_XATTR_INDEX_USER                   1
19 
#define EXT4_XATTR_INDEX_POSIX_ACL_ACCESS       2
20 
#define EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT      3
21 
#define EXT4_XATTR_INDEX_TRUSTED                4
22 
#define EXT4_XATTR_INDEX_LUSTRE                 5
23 
#define EXT4_XATTR_INDEX_SECURITY               6
24 
 
25 
struct ext4_xattr_header {
26 
        __le32  h_magic;        /* magic number for identification */
27 
        __le32  h_refcount;     /* reference count */
28 
        __le32  h_blocks;       /* number of disk blocks used */
29 
        __le32  h_hash;         /* hash value of all attributes */
30 
        __u32   h_reserved[4];  /* zero right now */
31 
};
32 
 
33 
struct ext4_xattr_ibody_header {
34 
        __le32  h_magic;        /* magic number for identification */
35 
};
36 
 
37 
struct ext4_xattr_entry {
38 
        __u8    e_name_len;     /* length of name */
39 
        __u8    e_name_index;   /* attribute name index */
40 
        __le16  e_value_offs;   /* offset in disk block of value */
41 
        __le32  e_value_block;  /* disk block attribute is stored on (n/i) */
42 
        __le32  e_value_size;   /* size of attribute value */
43 
        __le32  e_hash;         /* hash value of name and value */
44 
        char    e_name[0];       /* attribute name */
45 
};
46 
 
47 
#define EXT4_XATTR_PAD_BITS             2
48 
#define EXT4_XATTR_PAD          (1<<EXT4_XATTR_PAD_BITS)
49 
#define EXT4_XATTR_ROUND                (EXT4_XATTR_PAD-1)
50 
#define EXT4_XATTR_LEN(name_len) \
51 
        (((name_len) + EXT4_XATTR_ROUND + \
52 
        sizeof(struct ext4_xattr_entry)) & ~EXT4_XATTR_ROUND)
53 
#define EXT4_XATTR_NEXT(entry) \
54 
        ( (struct ext4_xattr_entry *)( \
55 
          (char *)(entry) + EXT4_XATTR_LEN((entry)->e_name_len)) )
56 
#define EXT4_XATTR_SIZE(size) \
57 
        (((size) + EXT4_XATTR_ROUND) & ~EXT4_XATTR_ROUND)
58 
 
59 
#define IHDR(inode, raw_inode) \
60 
        ((struct ext4_xattr_ibody_header *) \
61 
                ((void *)raw_inode + \
62 
                EXT4_GOOD_OLD_INODE_SIZE + \
63 
                EXT4_I(inode)->i_extra_isize))
64 
#define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1))
65 
 
66 
# ifdef CONFIG_EXT4DEV_FS_XATTR
67 
 
68 
extern struct xattr_handler ext4_xattr_user_handler;
69 
extern struct xattr_handler ext4_xattr_trusted_handler;
70 
extern struct xattr_handler ext4_xattr_acl_access_handler;
71 
extern struct xattr_handler ext4_xattr_acl_default_handler;
72 
extern struct xattr_handler ext4_xattr_security_handler;
73 
 
74 
extern ssize_t ext4_listxattr(struct dentry *, char *, size_t);
75 
 
76 
extern int ext4_xattr_get(struct inode *, int, const char *, void *, size_t);
77 
extern int ext4_xattr_list(struct inode *, char *, size_t);
78 
extern int ext4_xattr_set(struct inode *, int, const char *, const void *, size_t, int);
79 
extern int ext4_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int);
80 
 
81 
extern void ext4_xattr_delete_inode(handle_t *, struct inode *);
82 
extern void ext4_xattr_put_super(struct super_block *);
83 
 
84 
extern int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
85 
                            struct ext4_inode *raw_inode, handle_t *handle);
86 
 
87 
extern int init_ext4_xattr(void);
88 
extern void exit_ext4_xattr(void);
89 
 
90 
extern struct xattr_handler *ext4_xattr_handlers[];
91 
 
92 
# else  /* CONFIG_EXT4DEV_FS_XATTR */
93 
 
94 
static inline int
95 
ext4_xattr_get(struct inode *inode, int name_index, const char *name,
96 
               void *buffer, size_t size, int flags)
97 
{
98 
        return -EOPNOTSUPP;
99 
}
100 
 
101 
static inline int
102 
ext4_xattr_list(struct inode *inode, void *buffer, size_t size)
103 
{
104 
        return -EOPNOTSUPP;
105 
}
106 
 
107 
static inline int
108 
ext4_xattr_set(struct inode *inode, int name_index, const char *name,
109 
               const void *value, size_t size, int flags)
110 
{
111 
        return -EOPNOTSUPP;
112 
}
113 
 
114 
static inline int
115 
ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
116 
               const char *name, const void *value, size_t size, int flags)
117 
{
118 
        return -EOPNOTSUPP;
119 
}
120 
 
121 
static inline void
122 
ext4_xattr_delete_inode(handle_t *handle, struct inode *inode)
123 
{
124 
}
125 
 
126 
static inline void
127 
ext4_xattr_put_super(struct super_block *sb)
128 
{
129 
}
130 
 
131 
static inline int
132 
init_ext4_xattr(void)
133 
{
134 
        return 0;
135 
}
136 
 
137 
static inline void
138 
exit_ext4_xattr(void)
139 
{
140 
}
141 
 
142 
static inline int
143 
ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
144 
                            struct ext4_inode *raw_inode, handle_t *handle)
145 
{
146 
        return -EOPNOTSUPP;
147 
}
148 
 
149 
#define ext4_xattr_handlers     NULL
150 
 
151 
# endif  /* CONFIG_EXT4DEV_FS_XATTR */
152 
 
153 
#ifdef CONFIG_EXT4DEV_FS_SECURITY
154 
extern int ext4_init_security(handle_t *handle, struct inode *inode,
155 
                                struct inode *dir);
156 
#else
157 
static inline int ext4_init_security(handle_t *handle, struct inode *inode,
158 
                                struct inode *dir)
159 
{
160 
        return 0;
161 
}
162 
#endif

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.